netsnmp_table_row *
netsnmp_table_data_row_get( netsnmp_table_data *table,
netsnmp_table_row *row)
{
if (!table || !row)
return NULL;
return netsnmp_table_data_get_from_oid(table, row->index_oid,
row->index_oid_len);
}
/** finds the data in "datalist" stored at "indexes" */
netsnmp_table_row *
netsnmp_table_data_get(netsnmp_table_data *table,
netsnmp_variable_list * indexes)
{
oid searchfor[MAX_OID_LEN];
size_t searchfor_len = MAX_OID_LEN;
build_oid_noalloc(searchfor, MAX_OID_LEN, &searchfor_len, NULL, 0,
indexes);
return netsnmp_table_data_get_from_oid(table, searchfor,
searchfor_len);
}
netsnmp_table_row *
netsnmp_table_data_row_get_byoid( netsnmp_table_data *table,
oid *instance, size_t len)
{
return netsnmp_table_data_get_from_oid(table, instance, len);
}
/*
* The helper handler that takes care of passing a specific row of
* data down to the lower handler(s). It sets request->processed if
* the request should not be handled.
*/
int
netsnmp_table_data_helper_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_table_data *table = (netsnmp_table_data *) handler->myvoid;
netsnmp_request_info *request;
int valid_request = 0;
netsnmp_table_row *row;
netsnmp_table_request_info *table_info;
netsnmp_table_registration_info *table_reg_info =
netsnmp_find_table_registration_info(reginfo);
int result, regresult;
int oldmode;
for (request = requests; request; request = request->next) {
if (request->processed)
continue;
table_info = netsnmp_extract_table_info(request);
if (!table_info)
continue; /* ack */
switch (reqinfo->mode) {
case MODE_GET:
case MODE_GETNEXT:
case MODE_SET_RESERVE1:
netsnmp_request_add_list_data(request,
netsnmp_create_data_list(
TABLE_DATA_TABLE, table, NULL));
}
/*
* find the row in question
*/
switch (reqinfo->mode) {
case MODE_GETNEXT:
case MODE_GETBULK: /* XXXWWW */
if (request->requestvb->type != ASN_NULL)
continue;
/*
* loop through data till we find the next row
*/
result = snmp_oid_compare(request->requestvb->name,
request->requestvb->name_length,
reginfo->rootoid,
reginfo->rootoid_len);
regresult = snmp_oid_compare(request->requestvb->name,
SNMP_MIN(request->requestvb->
name_length,
reginfo->rootoid_len),
reginfo->rootoid,
reginfo->rootoid_len);
if (regresult == 0
&& request->requestvb->name_length < reginfo->rootoid_len)
regresult = -1;
if (result < 0 || 0 == result) {
/*
* before us entirely, return the first
*/
row = table->first_row;
table_info->colnum = table_reg_info->min_column;
} else if (regresult == 0 && request->requestvb->name_length ==
reginfo->rootoid_len + 1 &&
/* entry node must be 1, but any column is ok */
request->requestvb->name[reginfo->rootoid_len] == 1) {
/*
* exactly to the entry
*/
row = table->first_row;
table_info->colnum = table_reg_info->min_column;
} else if (regresult == 0 && request->requestvb->name_length ==
reginfo->rootoid_len + 2 &&
/* entry node must be 1, but any column is ok */
request->requestvb->name[reginfo->rootoid_len] == 1) {
/*
* exactly to the column
*/
row = table->first_row;
} else {
/*
* loop through all rows looking for the first one
* that is equal to the request or greater than it
*/
for (row = table->first_row; row; row = row->next) {
/*
* compare the index of the request to the row
*/
result =
snmp_oid_compare(row->index_oid,
row->index_oid_len,
request->requestvb->name + 2 +
reginfo->rootoid_len,
request->requestvb->name_length -
2 - reginfo->rootoid_len);
if (result == 0) {
/*
* equal match, return the next row
*/
if (row) {
row = row->next;
}
break;
} else if (result > 0) {
/*
* the current row is greater than the
* request, use it
*/
break;
}
}
}
if (!row) {
table_info->colnum++;
if (table_info->colnum <= table_reg_info->max_column) {
row = table->first_row;
}
}
if (row) {
valid_request = 1;
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_ROW, row,
NULL));
/*
* Set the name appropriately, so we can pass this
* request on as a simple GET request
*/
netsnmp_table_data_build_result(reginfo, reqinfo, request,
row,
table_info->colnum,
ASN_NULL, NULL, 0);
} else { /* no decent result found. Give up. It's beyond us. */
request->processed = 1;
}
break;
case MODE_GET:
if (request->requestvb->type != ASN_NULL)
continue;
/*
* find the row in question
*/
if (request->requestvb->name_length < (reginfo->rootoid_len + 3)) { /* table.entry.column... */
/*
* request too short
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
break;
} else if (NULL ==
(row =
netsnmp_table_data_get_from_oid(table,
request->
requestvb->name +
reginfo->
rootoid_len + 2,
request->
requestvb->
name_length -
reginfo->
rootoid_len -
2))) {
/*
* no such row
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
break;
} else {
valid_request = 1;
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_ROW, row,
NULL));
}
break;
case MODE_SET_RESERVE1:
valid_request = 1;
if (NULL !=
(row =
netsnmp_table_data_get_from_oid(table,
request->requestvb->name +
reginfo->rootoid_len + 2,
request->requestvb->
name_length -
reginfo->rootoid_len -
2))) {
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_ROW, row,
NULL));
}
break;
case MODE_SET_RESERVE2:
case MODE_SET_ACTION:
case MODE_SET_COMMIT:
case MODE_SET_FREE:
case MODE_SET_UNDO:
valid_request = 1;
}
}
if (valid_request &&
(reqinfo->mode == MODE_GETNEXT || reqinfo->mode == MODE_GETBULK)) {
/*
* If this is a GetNext or GetBulk request, then we've identified
* the row that ought to include the appropriate next instance.
* Convert the request into a Get request, so that the lower-level
* handlers don't need to worry about skipping on, and call these
* handlers ourselves (so we can undo this again afterwards).
*/
oldmode = reqinfo->mode;
reqinfo->mode = MODE_GET;
result = netsnmp_call_next_handler(handler, reginfo, reqinfo,
requests);
reqinfo->mode = oldmode;
handler->flags |= MIB_HANDLER_AUTO_NEXT_OVERRIDE_ONCE;
return result;
}
else
/* next handler called automatically - 'AUTO_NEXT' */
return SNMP_ERR_NOERROR;
}
/**
* The helper handler that takes care of passing a specific row of
* data down to the lower handler(s). It sets request->processed if
* the request should not be handled.
*/
int
netsnmp_table_data_helper_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_table_data *table = (netsnmp_table_data *) handler->myvoid;
netsnmp_request_info *request;
int valid_request = 0;
netsnmp_table_row *row;
netsnmp_table_request_info *table_info;
netsnmp_table_registration_info *table_reg_info =
netsnmp_find_table_registration_info(reginfo);
int result, regresult;
int oldmode;
for (request = requests; request; request = request->next) {
if (request->processed)
continue;
table_info = netsnmp_extract_table_info(request);
if (!table_info)
continue; /* ack */
/*
* find the row in question
*/
switch (reqinfo->mode) {
case MODE_GETNEXT:
case MODE_GETBULK: /* XXXWWW */
if (request->requestvb->type != ASN_NULL)
continue;
/*
* loop through data till we find the next row
*/
result = snmp_oid_compare(request->requestvb->name,
request->requestvb->name_length,
reginfo->rootoid,
reginfo->rootoid_len);
regresult = snmp_oid_compare(request->requestvb->name,
SNMP_MIN(request->requestvb->
name_length,
reginfo->rootoid_len),
reginfo->rootoid,
reginfo->rootoid_len);
if (regresult == 0
&& request->requestvb->name_length < reginfo->rootoid_len)
regresult = -1;
if (result < 0 || 0 == result) {
/*
* before us entirely, return the first
*/
row = table->first_row;
table_info->colnum = table_reg_info->min_column;
} else if (regresult == 0 && request->requestvb->name_length ==
reginfo->rootoid_len + 1 &&
/* entry node must be 1, but any column is ok */
request->requestvb->name[reginfo->rootoid_len] == 1) {
/*
* exactly to the entry
*/
row = table->first_row;
table_info->colnum = table_reg_info->min_column;
} else if (regresult == 0 && request->requestvb->name_length ==
reginfo->rootoid_len + 2 &&
/* entry node must be 1, but any column is ok */
request->requestvb->name[reginfo->rootoid_len] == 1) {
/*
* exactly to the column
*/
row = table->first_row;
} else {
/*
* loop through all rows looking for the first one
* that is equal to the request or greater than it
*/
for (row = table->first_row; row; row = row->next) {
/*
* compare the index of the request to the row
*/
result =
snmp_oid_compare(row->index_oid,
row->index_oid_len,
request->requestvb->name + 2 +
reginfo->rootoid_len,
request->requestvb->name_length -
2 - reginfo->rootoid_len);
if (result == 0) {
/*
* equal match, return the next row
*/
if (row) {
row = row->next;
}
break;
} else if (result > 0) {
/*
* the current row is greater than the
* request, use it
*/
break;
}
}
}
if (!row) {
table_info->colnum++;
if (table_info->colnum <= table_reg_info->max_column) {
row = table->first_row;
}
}
if (row) {
valid_request = 1;
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_NAME, row,
NULL));
/*
* Set the name appropriately, so we can pass this
* request on as a simple GET request
*/
netsnmp_table_data_build_result(reginfo, reqinfo, request,
row,
table_info->colnum,
ASN_NULL, NULL, 0);
} else { /* no decent result found. Give up. It's beyond us. */
request->processed = 1;
}
break;
case MODE_GET:
if (request->requestvb->type != ASN_NULL)
continue;
/*
* find the row in question
*/
if (request->requestvb->name_length < (reginfo->rootoid_len + 3)) { /* table.entry.column... */
/*
* request too short
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
break;
} else if (NULL ==
(row =
netsnmp_table_data_get_from_oid(table,
request->
requestvb->name +
reginfo->
rootoid_len + 2,
request->
requestvb->
name_length -
reginfo->
rootoid_len -
2))) {
/*
* no such row
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
break;
} else {
valid_request = 1;
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_NAME, row,
NULL));
}
break;
case MODE_SET_RESERVE1:
valid_request = 1;
if (NULL !=
(row =
netsnmp_table_data_get_from_oid(table,
request->requestvb->name +
reginfo->rootoid_len + 2,
request->requestvb->
name_length -
reginfo->rootoid_len -
2))) {
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_NAME, row,
NULL));
}
break;
case MODE_SET_RESERVE2:
case MODE_SET_ACTION:
case MODE_SET_COMMIT:
case MODE_SET_FREE:
case MODE_SET_UNDO:
valid_request = 1;
}
}
if (valid_request) {
/*
* If this is a GetNext or GetBulk request, then we've identified
* the row that ought to include the appropriate next instance.
* Convert the request into a Get request, so that the lower-level
* handlers don't need to worry about skipping on....
*/
oldmode = reqinfo->mode;
if (reqinfo->mode == MODE_GETNEXT || reqinfo->mode == MODE_GETBULK) {
reqinfo->mode = MODE_GET;
}
result = netsnmp_call_next_handler(handler, reginfo, reqinfo,
requests);
if (oldmode == MODE_GETNEXT || oldmode == MODE_GETBULK) { /* XXX */
for (request = requests; request; request = request->next) {
/*
* ... but if the lower-level handlers aren't dealing with
* skipping on to the next instance, then we must handle
* this situation here.
* Mark 'holes' in the table as needing to be retried.
*
* This approach is less efficient than handling such
* holes directly in the table_dataset handler, but allows
* user-provided handlers to override the dataset handler
* if this proves necessary.
*/
if (request->requestvb->type == ASN_NULL ||
request->requestvb->type == SNMP_NOSUCHINSTANCE) {
request->requestvb->type = ASN_PRIV_RETRY;
}
/* XXX - Move on to the next object */
if (request->requestvb->type == SNMP_NOSUCHOBJECT) {
request->requestvb->type = ASN_PRIV_RETRY;
}
}
reqinfo->mode = oldmode;
}
return result;
}
else
return SNMP_ERR_NOERROR;
}
